Burglar-alarm.



PATENTED JULY 14, 1908. E. REICHENBAGH. BURGLAR ALARM. APPLICATION rum) JAN. 27. 1908.

anoentoz 6m W Q vitnmmo EDWARD REIOHENBAGH, OF JEFFERSON, WISCONSIN.

BURGLAR-ALARM.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed January 27, 1908. Serial No. 412,794.

T 0 all whom it may concern.

Be it known that I, EDWARD REICHEN- BAOH, a citizen of the United States, residing at Jefferson, in the county of Jefferson and State of Wisconsin, have invented certain new and useful Improvements in Burglar- Alarms, of which the following is a specification.

This invention relates to certain improvements in bur lar alarms and has particular reference to that class of alarms such as are shown and described in Letters Patent of the United States numbered 534,482 and granted to me February 19th, 1895 in which a cartridge carrying cylinder is mounted on a door or window so as to be displaced and dropped and thereby operate a hammer to explode the cartridge.

My present invention consists in an improved construction and arrangement of hammer and cartridge-carrying device and I further in an improved device for guiding the alarm device as it is released from its support.

The accompanying drawing illustrates the invention in which Figure 1, shows a portion of a door-frame and door with my improved burglar alarm attached thereto ready for operation upon the opening of the door. Fig. 2, illustrates a similar 'view showing the alarm device hung at a different point on the door and frame. Fig. 3, shows a sectional elevation of the alarm-device,the movable cartridgecarrying member being sectioned to illustrate the chambers and the cartridges in position. Fig. 4, illustrates a sectional plan view of the alarm,the section being taken on the line 41 of Fig. 3, and Fig. 5, shows a detail of the alarm guide device Referring to the drawing the numeral, 1, designates a hammer base plate, provided with a stem, 2, which projects at ri ht angles to said plate and extends upwardly therefrom. The cross sectional shape of this stem may be varied and the same may be round or angular but in the present instance I prefer to make it angular so as to produce a flat surface, 3, at one or more sides thereof. The upper end of the stem is provided with suitable means by which it may be hung or sustained, which in the present instance has the form of a perforation or slot, 4.

The base plate is provided on its upper surface with a plurality of projections, 5, which are disposed with respect to the stem,

2, so as to balance the base and in the present instance these projections are arranged at opposite sides of the said stem. These projections are preferably tapered so as to produce pointed upwardly-projecting ends,

6, which serve as firing pins as will presently be described.

A cartridge-carrying member, 7, is provided with a plurality of chambers, 8, into which blank cartridges, 9, may be inserted, and the chambers are so arranged asto be centered over the firing pins or projections, 5, when the carrying member and base are brought together.

Between the chambers, the carrying member is provided with a passage, 10, which has a cross-sectional shape similar to the shape of the stem, which in the present instance is angular, so that when the stem of the base is inserted in the passage of the cartridge-carrying member independent rotation between the two will be prevented.

When the carrying member is in position on the stem the head or cap-end, 11, of the cartridges have position adjacent to the upper side of the base and directly over the firing pins so that when the firing pins and cartridges are suddenly brought together the blank cartridges will be exploded.

It is to be understood that the cartridgecarrying member is unsecured on the stem except as to its rotation thereon, and that it has a slight vertical movement on the stem toward and from the firing pins.

In the practical operation of detonating alarm devices such as heretofore described one serious difficulty has resulted from the fact that the movement of the door or window which is relied upon to liberate or release the alarm device also frequently causes the device to turn during its descent and then strike in a manner that fails to operate the firing pins effectively and consequently the cartridges are not exploded. I have also discovered that in some instances the alarm device in falling would strike the door knob or the projecting pintle portion of the hinges on the door and thereby cause the device to land without effecting an explosion of the cartridges. One object therefore of my invention is to provide a device that will direct or steady the alarm device as it is released so that in falling it will avoid contact with such projections as above referred to. By reference to Figs. 1, 2 and 5 it will be seen that this guide device, 12, is constructed so that it may be readily secured to a door or window and in the resent instance is formed from a sheet meta plate having aflat base portion, 13, with a hemmed edge, 14, with pointed securing projections, 15, extending laterally from said hemmed edge. At one end of the base, 13, the metal late is turned laterally to form an outward y-projecting support, 16, and at the outer end said support carries or is formed into a tubular guide, 17, through which the stem, 2, projects when the alarm is in the operative position, as shown in Figs. 1 and 2.

In operation one or more of the alarm devices may be attached at various or any preferred portion of the door and frame so that as the door is opened the alarm or alarms, to case more than one are used, may be released and operated. A pin, 18, is first secured to the frame,"19, or to any device that has a stationary position with. respect to the door and the guide device, 12, is then attached to the door, 20, adjacent to said stationary pin. The stem, 2, is then passed upwardly through the tubular portion, 17, of the guide and its upper perforated end projected therethrough and hung on the stationary pin, 18, and the device is then ready for operation. When the door is swung open the perforated end of the stem, 2, is drawn off the stationary pin, 18, and the device thus released from support begins its descent. In withdrawing from the tubular portion, 17, when falling, the stem is guided to direct the device away from any projection on the door with which it might come in contact and while it may be initially started in an incline direction as it leaves the tubular portion, 17, it will right itself and assume a vertical position before it strikes the floor and thus drive the firing points of pins, 5, into the blank cartridge and cause the latter to explode and thus give an alarm.

In order to prevent loss or separation of the cartridge carrying member from the stem, 2, I provide the latter with a notch or recess, 21, which extends vertically along the side of the stem and in this recess I secure a flat spring finger, 22, at its upper end so that the lower end of said finger may project outwardly over the top surface of the carrying member and prevent the latter from moving upwardly in the stem beyond the lower end of the finger. By pressing the lower end of the finger into the recess the carrying member may be withdrawn when desired.

A device made in accordance with my invention is durable, and positive in its operation and cheap tomanufacture.

Having thus described my invention what I claim and desire to secure by Letters Patent is,

1. The combination with the base having a firing pin, of a stem projecting from said base; a cartridge-carrying member movable on the stem above the base; means for sustaining said devices from the upper end of the stem and a guide device interposed between the sustaining means and carrying member.

2. The combination with the base having firing pins, of a stem projecting from said base; a cartridge-carrying member movable on the stem above the base; means for sustaining said devices from the upper end. of the stem and a tubular guide device interposed between the sustaining means and carrying member and engaging the stem for the purpose set forth.

3. The combination with the base havin firing pins, of a stem projecting from sai base; a cartridge-carrying member movable on the stem above the base; a stationary device for sustaining said devices at the upper end of the stem; a tubular guide through which the stem projects,said guide being provided with means for securing it in place.

4. The combination with the base having a central stem projecting upwardly therefrom, of a firing pin on said base at each side of said stem; a cartridge carrying member having a central passage and a cartridge chamber at each side thereof, and a movable device coacting with the carrying member and stem for limiting the relative movement of the two.

5. The combination with the base having a central stem, of a flat spring secured to the side of the stem with its lower end movable at the side of the latter; firing pins on the base at the sides of the stem and a cartridge carrying member having a central passage and a cartridge chamber at the sides thereof, said member being movable on the stem below the movable spring.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD REIOHENBAOH.

Witnesses:

W. S. KISPORT, W. S. HENRY. 

